Manny Pacquiao and Juan Manuel Marquez will meet for the fourth time this Saturday night, with both men vowing not to let the fight go to the judges

Upper hand: All three of Pacquiao's bouts with Marquez went to the scorecards, with Pacquiao winning two and drawing one

Boxing’s most contentious rivalry is set to end with a knockout this Saturday night.

Both Manny Pacquiao and Mexican warrior Juan Manuel Marquez insist that they will flatten the other to conclusively prove who the superior fighter is as they clash for the fourth time in Las Vegas.

The previous three fights have all gone the 12 round distance and despite a draw in their initial encounter in 2004, and Pacquiao winning closely contested points decisions in the other two, the matchups have been the subject of much controversy.

Despite Pacquiao catching the judges’ eyes, many experts and fight fans believe that Marquez has been the rightful victor in their past encounters.

However, despite not getting the rub of the green, Marquez is adamant that this time round he has the tools to stop it going to the scorecards.

"A lot of people know what happened in the last three fights but I’ve prepared myself very hard because I want to give another great show," said Marquez

"After this fight it might be the end of the chapters.

"I’m trying to look for the knockout. Pacquiao said he wants to knock me out but I want to knockout him out. Manny is a strong fighter, he’s maybe the toughest I’ve fought. But I’m ready for this fight. I’ve trained very hard and I’m in great condition for the twelve rounds.

"This is the most interesting fight. I know I need to change something because he knows me - I need a perfect performance."

The Filipino star, who is regarded as one of the best pound-for-pound fighters in the world, claims he will be going into this bout as the aggressor, in a fight he believes will be the last between the two.

"We changed a little bit of our strategy for this fight. We studied his style and we’re ready for him," Pacquiao explained.

"He knows how I like to fight which is getting in and out so I will be trying to counter-punch more.

"My focus is on more aggression and if I have the chance to finish the fight early I will grab it. Marquez never accepted that he lost the last three fights so it’s up to me to show him in this one,” added the eight-division world champion.